<!DOCTYPE html><html><head>
  <title>ID selectors</title>
  <style type="text/css">li { background-color : red }
#t1 { background-color : lime }
li#t2 { background-color : lime }
li#t3 { background-color : lime }
#t4 { background-color : red }</style>
  <link rel="author" title="Daniel Glazman" href="http://glazman.org/">
  <link rel="author" title="Ian Hickson" href="mailto:ian@hixie.ch">
  <link rel="help" href="https://www.w3.org/TR/css3-selectors/#selectors"> <!-- bogus link to make sure it gets found -->
  <meta name="flags" content="">
 </head>
 <body>
<ul>
  <li id="t1">This list item should have a green background. because its ID is "t1"</li>
  <li id="t2">This list item should have a green background. because its ID is "t2"</li>
  <li id="t3"><!--Replaced (li#t3) --></li>
</ul>

</body></html>